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Intel 4040
The Intel 4040 was the successor to the Intel 4004. It was introduced in 1974.
New Features
- Interrupt
- Single Step
Extensions
- Instruction Set expanded to 60 instructions
- Program memory expanded to 8K bytes
- Registers expanded to 24
- Subroutine stack expanded to 7 levels deep
New Support chips
- 4201 - Clock Generator
- 4308 - 1K byte ROM
- 4207 - General Purpose byte Output port
- 4209 - General Purpose byte Input port
- 4211 - General Purpose byte I/O port
- 4289 - Standard Memory Interface (replaces 4008/4009)
- 4702 - 256 byte UVEPROM
- 4316 - 2K byte ROM
- 4101 - 256 4-bit word RAM
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